Tension apparatus for yarn-winding frames and the like.



W. LISTER. TENSION APPARATUS FOR YARN WINDING FRAMES AND THE LIKE- APPLICATION FILED ocT.2' 1. 1915.

1,211,862. Patented Jan. 9,1917.

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WILLIAM LISTER, OF NELSON, ENGLAND.

TENSION APPARATUS FOR YARN-WINDING FRAMES AND THE LIKE.

Application filed October 27, 1915.

To all whom it may concern Be it known that I, WILLIAM Lrsrnn, a subject of His Majesty the King of Great Britain, residing at Nelson, in the county of York, England, have invented new and useful Improvements in Tension Apparatus for Yarn-finding Frames and the like, of

ting exactly into corres aondin lv sha ed slots or recesses formed in the rail and being held in position therein preferably by means of plugs or circular projections formed on their undersides which plugs fit into holes in the rail. To guide the yarn beneath the balls the blocks are notched at back and front; and to prevent the balls from being lifted out of position they are engaged on two opposite sides by arch shaped pins fitting into holes in the blocks. To lead the yarn between one of a pair of pins and the ball between said pair and thence into position beneath the ball, I may employ vertical triangular or crescent shaped guides rounded at the angles, said guides being secured to the rail in such a position that they normally slightly overlap the pins and thus hold the parts in position. By turning the guides on their attaching screws or the like, however, the pins and thus the balls, and if necessary the blocks in which the balls lie, can readily be removed.

Referring to the accompanying drawings, Figure 1 represents in front elevation a portion of the tension rail, Fig. 2 is a section thereof taken on the line AB in Fig. l, and Fig. 3 is a plan of a block detached.

The reference numeral 1 indicates the tension rail, on the sloping back of which are thread guides 2. In recesses on the said rail are placed blocks 3, each having curved or tapering notches 0r slots {I for guiding the yarn as it approaches and leaves the ball 5, and four holes 6 for receiving the arched pins or staples 7. Preferably the recesses and blocks are square and the notches on all four sides of the blocks, so

Specification of Letters Patent.

Patented Jan. 9, 1917.

Serial No. 58,199.

that by lifting out the blocks and turning them around to the extent of a quarter of a revolution, a fresh pair of notches can be brought into action the pins 7 being like wise turned at ri ht angles to their previous positions. The foot of each block consists of a circular plugS (Fig. 2) adapted to fit into a corresponding hole in the rail; the center of thisplug is bored for the reception of a rubber or other like ring or tube 9, which projects above the surface of the central cup of the block 3 preferably only to the extent of the thickness of the yarn, and forms a seat for the ball 5. The ball being thus practically in contact with the block over a large portion, say one-third, of its surface, except in so far as the ball is lifted clear by the yarn, the yarn is braked throughout its passage through the cup, and the ball only rests on or makes effective contact with the tube 9 when an end breaks, when in consequence of the clinging nature of the tube 9 the speed of rotation of the ball is immediately checked and quickly stops the passage of the yarn; it also tends to prevent the ball from rattling. To the pillars 10, which are screwed or otherwise rotatable in the rail, are pivoted at 11 vertical guides 12, which may be of any suitable shape, for example approximately triangular as shown, and provided with notches 13 adapted to engage the tops of the arched pins 7. The guides 12 might, if suitably shaped, be connected directly to the rail instead of by pillars 10; they are turned at right-angles, that is across the rail instead of along the rail, when it is required to insert or remove the pins, balls or blocks as aforesaid.

I claim as my invention In tension apparatus of the ball drag type for yarn winding frames and the like, a notched block forming a seat for the ball and having a central downwardly directed openingv lined with a ring or tube of a resilient material such as rubber.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

WILLIAM LISTER.

Witnesses:

ERNOLD SIMPSON MooDLY, MALCOLM SMETHURST.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

